Hongbo Chi (IMAGE) St. Jude Children's Research Hospital Caption Hongbo Chi, Ph.D., of the St. Jude Department of Immunology, identified a biological pathway that selectively controls how key immune cells mature into functional components of the immune system. Credit St. Jude Children's Research Hospital Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.